The hallucinogenic center of the ancient world.

A naturally mummified 2,000-year-old man.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

An ever-growing field of footwear invites legends and more shoes.

Real bones which are said to have belonged to a Polish dragon.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

Rebuilt remains of a temple to Roman god Mithras.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The remains of the great moral philosopher reside in a university in London.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

This luxury shopping lane has been protected by its own tiny police force for over a century.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Hidden beneath the streets of London is a secret subway that only carried mail.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

An unusual number plate signifies the building's saucy past.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Erotic art covers the walls of the largest ancient pleasure palace.